What you are allowed to bring into Canada
You are allowed, per person, 1 litre (32oz) of alcohol or 1 case of 24 beer, 1 carton of cigarettes, a reasonable amount of food for the number people vacationing, along with personal clothing and fishing equipment.

What you are not allowed to bring into Canada
You cannot bring into the country live bait in water, worms packed in earth, hand guns and unregistered firearms or mace and pepper spray. Vegetables grown in your garden will be allowed if there is no visible sign of dirt. All fruits and vegetables are to be in the packages they came in from the store. (potatoes in the bag)

DUI Charges and Other Issues
Our Canadian Immigration and Visitor regulations restrict persons with convictions that would be considered criminal charges in Canada to enter Canada. If you have had a DUI (driving under the influence) charge against you, and if it shows up on your records in the US (which can be accessed by our Customs & Immigration officers through co-operative agreements between the US and Canada) then you may be denied entry to Canada. Random checks are common. Changes to these restrictions have been made. A person with a one time offence that did not result in jail time is now allowed entry to Canada, with no application or fees.